EP0868972A1 - Procédé et dispositif pour l'usinage de lentilles optiques - Google Patents

Procédé et dispositif pour l'usinage de lentilles optiques Download PDF

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Publication number
EP0868972A1
EP0868972A1 EP97105089A EP97105089A EP0868972A1 EP 0868972 A1 EP0868972 A1 EP 0868972A1 EP 97105089 A EP97105089 A EP 97105089A EP 97105089 A EP97105089 A EP 97105089A EP 0868972 A1 EP0868972 A1 EP 0868972A1
Authority
EP
European Patent Office
Prior art keywords
tool
lens body
clamping
axis
spindles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97105089A
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German (de)
English (en)
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EP0868972B1 (fr
Inventor
Roland Dipl.-Ing. Mandler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Optotech Optikmaschinen GmbH
Original Assignee
Optotech Optikmaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Optotech Optikmaschinen GmbH filed Critical Optotech Optikmaschinen GmbH
Priority to DE59700201T priority Critical patent/DE59700201D1/de
Priority to EP97105089A priority patent/EP0868972B1/fr
Priority to DE29723542U priority patent/DE29723542U1/de
Priority to CA002232258A priority patent/CA2232258A1/fr
Priority to US09/047,516 priority patent/US5951376A/en
Publication of EP0868972A1 publication Critical patent/EP0868972A1/fr
Publication of EP0868972B1 publication Critical patent/EP0868972B1/fr
Application granted granted Critical
Priority to US09/351,907 priority patent/US6383061B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0031—Machines having several working posts; Feeding and manipulating devices

Definitions

  • the present invention relates to a method for processing optical Lenses and according to an apparatus for performing the method the preambles of claim 1 and claims 8 and 18, respectively.
  • hot-pressed glass blanks are processed, which is the shape of flat cylindrical disks or equivalent of the desired lens shape each have curved surfaces on the end faces.
  • the glass blanks are grinded to the desired one Contour brought by the lens blank on a first device roughly ground on one side and a polishable one in a second step Fine grinding is generated.
  • the lens is then removed from this first grinding machine, turned and with a second grinding machine the other side of the Coarse and fine grinding lens also provided.
  • the lens is then polished on both sides.
  • the finish polished Lens on a fourth device, the so-called centering machine, also machined on the edge.
  • the lens edge gets a precise, circular geometry, if necessary also with chamfers on the edges to make the edges more impact-resistant.
  • the lens is made of metal between centering bells held, which align the lens so that its optical axis with the Axis of rotation of the centering spindle coincides.
  • the self-centering effect of the centering bells is not given.
  • the lenses must be in a separate centering device using a light beam be centered before gluing them onto a centering spindle, using this in Offset and grinds at the outer edge to achieve that the optical Axis of the lens aligned with its geometric axis becomes.
  • a disadvantage of the previous method for producing lenses is that in addition to the polishing machine a total of two grinding machines and one centering machine are needed. As far as is known, this is e.g. Most modern at the moment Technology, where it has already been assumed that rough and fine grinding per lens side is performed on a single device. Yet the machine effort is considerable.
  • the lens in the previous method is stretched on its outer circumference, which only the quality and accuracy of a glass compact.
  • the Lens turned as described and clamped again in a second device.
  • An important aim of the invention is to manufacture lenses and inexpensively at the same time to increase the machining accuracy.
  • the proposed procedure and the device for carrying out the method further purposes a simplification of the coarse and fine grinding of both lens sides and the Centering.
  • the invention provides according to the characterizing part of claim 1, that the or each lens body has a heel or is provided with one that Allows one-time clamping and removed at the end of processing becomes.
  • a new geometry of the lens blank the is usually a hot pressed vitreous body, the shape of which is within certain limits can be varied without incurring any significant additional costs.
  • the new shape of the lens body differs from the previous shape of the Lens blanks by a clamping heel of z. B. a few millimeters in height one side of the lens body, compared to the outer diameter of the Clamping shoulder with its diameter clearly decreases.
  • the embodiment according to claim 3 is very advantageous, the removal from a first clamping and the introduction into a second clamping with a only intermediate stopping and turning process takes place. This allows not only considerable savings on machine tools, but also contributes also contribute significantly to the accuracy of lens processing. It can be done in everyone Clamping according to claim 4 also the edge processing of the lens body be made.
  • a circumferential machining for subsequent centering take place, so that in the second clamping the lens body already clamped on the machined, and therefore very precise outer circumference and is aligned with the axis of rotation of the workpiece spindle. How to get that in the subsequent rough and fine grinding of the second lens side, the optical The axis of this lens surface again coincides exactly with its geometric axis.
  • the embodiment of claim 6, according to which the controlled movements of workpiece and tools on a single machine be that the lens body on each side first on the face and then worked on the scope.
  • the partially or fully machined Provide the lens body with a bevel at least on one side to protect the or each edge of the lens body.
  • the workpiece spindles have clamping means for the lens body on, especially collets that can be operated pneumatically or hydraulically could be.
  • the unloading device and the charging device each have clamping means for the lens body, especially suction clamps.
  • the workpiece spindles are on the one hand and the tool spindles on the other hand, independently of each other in the direction of the Z axis or X-axis movable, with the tool spindles each having their own B-axis feature.
  • all four spindles are used at the same time, to process two lenses at the same time.
  • the invention provides according to claim 13 that the workpiece spindles parallel to each other and perpendicular to the main extent of a feed carriage are supported on this.
  • the tool spindles on a feed carriage located above the workpiece spindles be supported, which is pivotable about the horizontal pivot axis and the carries both workpiece spindles at a constant distance.
  • the claim 14 be the same as between the workpiece spindles.
  • Such a device can be designed as a fully automatic machine, so that no manual intervention is required to process the Lens body from the blank shape to the finished contour.
  • Essentials Quality advantages result from the fact that the optical axes of both Lens sides coincide with the geometric axis, so that the optical axes of both lens sides inevitably coincide with each other.
  • two workpiece spindles 1 and 2 are on one common feed carriage 3 attached, the simultaneous movement of the both workpiece spindles 1 and 2 in the vertical direction (Z axis).
  • two tool spindles 4 and 5 are preferably on one common feed carriage 6 attached, the simultaneous horizontal movement (Direction X axis).
  • For the feed carriage 6 and the associated tool spindles 4 and 5 is a common B axis to which the feed carriage 6 together with the tool spindles 4 and 5 can be pivoted in both directions.
  • the workpiece spindles 1 and 2 are for receiving a lens body 7 arranged vertically in the lower part of the device, while in its upper part a right tool spindle 4 is a rough grinding tool 8 and a left tool spindle 5 carries a fine grinding tool 9.
  • the grinding process itself is first carried out with the rough grinding tool 8, the according to the invention not only via an end grinding surface 16 for manufacturing the desired lens shape, but also has a peripheral Grinding surface 17, which is used to edit the lens circumference and to manufacture a chamfer serves to be able to center the lens body 7 exactly. That afterwards
  • the fine grinding tool 9 also has an end face Grinding surface 19 and a circumferential grinding surface 20.
  • an unloading device 10 which also performs vertical movements and at their lower end over one Suction clamp 11 has.
  • the unloading device 10 is on the feed carriage 6 attached and can therefore also horizontal movements along the X-axis To run.
  • the lens body 7 can be completed the first surface and after centering from the clamping tool Remove 12 from the first workpiece spindle 1.
  • a loading device 13 which is provided with a suction clamp 14 and in a horizontal C-axis can be rotated by 180 °, takes over on one side and on Scope machined lens body 7 from the unloading device 10. It is then into e.g. Clamping tool 15 of the second workpiece spindle designed as a collet 2 inserted and stretched on the machined edge.
  • the unloading device 10 and the charger 13 are designed so that they from the Working area of workpiece spindles 1 and 2 or tool spindles 4 and 5 can drive out.
  • Fig. 1 The blank of the lens body 7 is inserted into the clamping tool 12 of the workpiece spindle 1 and mechanically clamped on its clamping shoulder 18 by means of the automatically actuated clamping tool 12, which can be a vacuum-assisted collet.
  • Fig. 2 With the coarse grinding tool 8 on the tool spindle 4, the lens body 7 is roughly pre-ground, the end-face grinding surface 16 being in use.
  • the previously required positioning movement of the rough grinding tool 8 is carried out along the X axis with tool spindle 4 and feed carriage 6, while the feed movement takes place through the feed slide 3 with workpiece spindle 1 and clamping tool 12 with lens body 7 along the Z axis.
  • the feed carriage 6 together with the parts connected to it is pivoted about the B axis.
  • the lens body 7 is set in rotation by means of the workpiece spindle 1, while the coarse grinding tool 8 is driven by the workpiece spindle 4.
  • Fig. 3 After rough grinding, the workpiece spindle 1 moves down again along the Z axis; the tool spindle 5 with the fine grinding tool 9 is moved into the working position in the direction of the X axis. The fine grinding process then proceeds as described above for rough grinding, with the front grinding surface 19 being in use. The feed carriage 6 with the tool spindles 4 and 5 attached to it is pivoted again about the B axis, but this time in the opposite direction.
  • Fig. 4 By moving in the direction of the Z and X axes, either the rough grinding tool 8 or the fine grinding tool 9 or both - if necessary one after the other - are then brought into the working position in order to machine the circumference of the lens body 7. In the chamfer shown, the circumferential grinding surface 20 of fine grinding tool 9 is in use. A reclamping of the lens body 7 does not take place, so that the optical axis and the geometric axis, which is now defined, coincide exactly with one another.
  • a chamfer is attached to the lens body 7, for which purpose the tool spindle 5 is pivoted about the B axis in the required manner.
  • the peripheral grinding surface 20 of fine grinding tool 9 is in use.
  • the unloading device 10 By moving the feed carriage 6 in the direction of the X axis, the unloading device 10 is positioned over the workpiece spindle 1 with the lens body 7, so that the suction clamp 11 can grasp the latter and remove it from the clamping tool 12 of the workpiece spindle 1 by means of a vertical stroke.
  • Fig. 7 The loading device 13 is moved forward into the working position and thereby makes a 180 ° rotation about the C-axis, so that the suction clamp 14 points upwards. After positioning the feed carriage 6 together with the vertically moving unloading device 10, it takes over the lens body 7 from the latter.
  • the charging device 13 After the unloading device 10 has been raised, the charging device 13 now rotates 180 ° about the C axis, so that the suction clamp 14 with the lens body 7 held by it points downward.
  • the lens body 7 can be inserted into the clamping tool 15 of the spindle 2.
  • the surface that has already been worked points downwards, ie towards the spindle 2, while the unprocessed side with the clamping shoulder 18 is directed upwards.
  • Fig. 10 The second side of the lens body 7 is processed by grinding with the coarse grinding tool 8, the front grinding surface 16 being used.
  • the working movements of the various machine parts in the X and Z axes and around the B axis are analogous to the movements described above, ie as when processing the first side of the lens.
  • the clamping shoulder 18 is also ground.
  • the polishable surface of the second lens side is also produced by grinding with the fine grinding tool 9, for which purpose the front-side grinding surface 19 is used.
  • a bevel is also attached to this second side of the lens 7 by means of a fine grinding tool 9, the peripheral surface 20 being used.
  • the described method in cooperation with the invention Device results in lenses of higher precision at significantly lower manufacturing costs. Instead of the usual three machines for coarse and fine grinding the first side or rough and fine grinding of the second side with subsequent Centering on a separate device is now only one device needed. Because the lens body is already centered during the grinding process the elaborate and dangerous for the sensitive lens surface Center the polished lens.
  • each lens body 7 has a clamping shoulder 18.
  • a only one device is sufficient to carry out the method. She disposes of Via workpiece spindles 1, 2 and tool spindles 4, 5 with coarse tools 8 and fine tools 9 also via an unloading device 10 and a loading device 13, the successive interaction of the one Side and circumferentially machined lens body 7 from a clamping tool 12 Remove from workpiece spindle 1, turn through 180 ° and to machine the insert the other side centered in a clamping tool 15 of workpiece spindle 2.
  • the workpiece spindles 1, 2 can be parallel to each other on a horizontal movable and height-adjustable feed carriage 3 can be attached.
  • a Feed carriage 6 can carry the tool spindles 4, 5 together with the unloading device 10 Move together and swivel around a horizontal axis B.
  • the charger 13 is between the workpiece spindles 1, 2 and the tool spindles 4, 5 pivotable about a horizontal axis C.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP97105089A 1997-03-26 1997-03-26 Procédé et dispositif pour l'usinage de lentilles optiques Expired - Lifetime EP0868972B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE59700201T DE59700201D1 (de) 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Bearbeitung optischer Linsen
EP97105089A EP0868972B1 (fr) 1997-03-26 1997-03-26 Procédé et dispositif pour l'usinage de lentilles optiques
DE29723542U DE29723542U1 (de) 1997-03-26 1997-03-26 Vorrichtung zur Bearbeitung optischer Linsen
CA002232258A CA2232258A1 (fr) 1997-03-26 1998-03-16 Procede et dispositif de traitement de lentilles optiques
US09/047,516 US5951376A (en) 1997-03-26 1998-03-25 Procedure of and device for processing optical lenses
US09/351,907 US6383061B1 (en) 1997-03-26 1999-07-14 Procedure of and device for processing optical lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97105089A EP0868972B1 (fr) 1997-03-26 1997-03-26 Procédé et dispositif pour l'usinage de lentilles optiques

Publications (2)

Publication Number Publication Date
EP0868972A1 true EP0868972A1 (fr) 1998-10-07
EP0868972B1 EP0868972B1 (fr) 1999-06-09

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EP97105089A Expired - Lifetime EP0868972B1 (fr) 1997-03-26 1997-03-26 Procédé et dispositif pour l'usinage de lentilles optiques

Country Status (4)

Country Link
US (2) US5951376A (fr)
EP (1) EP0868972B1 (fr)
CA (1) CA2232258A1 (fr)
DE (2) DE59700201D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003033205A1 (fr) * 2001-10-17 2003-04-24 Schneider Gmbh & Co. Kg Dispositif et procede pour l'usinage complet de lentilles optiquement actives sur les deux faces
DE19750428B4 (de) * 1997-11-14 2007-06-21 Optotech Optikmaschinen Gmbh Verfahren und Vorrichtung zum Bearbeiten von Linsen
EP2011603A1 (fr) * 2007-07-06 2009-01-07 Satisloh AG Machine destinée au traitement de pièces optiques, en particulier de verres solaires en plastique
WO2012088051A3 (fr) * 2010-12-23 2012-08-23 Exelis, Inc. Procédé et appareil pour polir et meuler une surface de rayon sur l'extrémité axiale d'un cylindre

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US6106366A (en) * 1998-10-29 2000-08-22 Gerber Coburn Optical, Inc. Lens grinder
DE10008710C2 (de) * 2000-02-24 2002-01-10 Loh Optikmaschinen Ag Vorrichtung zum zentrierenden Spannen von optischen Linsen für deren Randbearbeitung
DE10013648A1 (de) * 2000-03-18 2001-09-27 Wernicke & Co Gmbh Anlage zum Formbearbeiten der Ränder von Brillengläsern
US6478658B1 (en) * 2000-07-25 2002-11-12 Gerber Coburn Optical, Inc. Apparatus for generating lens surfaces
DE10112883B4 (de) * 2001-03-15 2009-07-09 Schneider Gmbh & Co. Kg Linsenbearbeitungsmaschine
US20030137636A1 (en) * 2002-01-18 2003-07-24 Kok-Ming Tai Edge protection ring for polishing a lens
US7749051B2 (en) * 2002-06-28 2010-07-06 Carl Zeiss Smt Ag Method and apparatus for aligning optical elements
JP2004261954A (ja) * 2003-02-14 2004-09-24 Seiko Epson Corp 研磨方法
US6855036B1 (en) * 2003-08-05 2005-02-15 Corning Incorporated Part-holding fixture for grinding wedged optical flats
DE102004021721B3 (de) * 2004-04-30 2005-10-20 Schneider Gmbh & Co Kg Linsenbearbeitungsmaschine
CN100455402C (zh) * 2005-04-08 2009-01-28 姚炳泉 汽车空调压缩机气缸用半球的加工方法
DE102006028164B4 (de) * 2006-06-16 2009-04-02 Satisloh Ag Schleif- und Poliermaschine zum Schleifen und/oder Polieren von Werkstücken in optischer Qualität
FR2906746B1 (fr) * 2006-10-10 2009-05-22 Essilor Int Dispositif d'usinage de lentilles ophtalmiques comprenant une pluralite d'outils d'usinage disposes sur un module orientable
FR2912335B1 (fr) * 2007-02-13 2009-04-17 Essilor Int Machine de detourage d'une lentille de lunettes,pourvue d'un porte-outils tournant sur lequel sont montes plusieurs outils de travail
DE102007042667A1 (de) * 2007-09-10 2009-03-12 Schneider Gmbh & Co. Kg Poliermaschine für Linsen und Verfahren zum Polieren einer Linse mit einer Bearbeitungsmaschine
DE102009041442A1 (de) * 2009-09-16 2011-03-24 Satisloh Ag Vorrichtung zur Feinbearbeitung von optisch wirksamen Flächen an insbesondere Brillengläsern
TWM383466U (en) * 2010-03-02 2010-07-01 Axisco Prec Machinery Co Ltd High-efficiency fine & coarse grinding CNC dual-axes surface grinder
FR3002871B1 (fr) * 2013-03-08 2015-03-13 Essilor Int Dispositif de detourage de lentilles ophtalmiques
FR3008914B1 (fr) * 2013-07-26 2015-09-04 Essilor Int Procede et machine de gravure de lentilles optiques
DE102014003598B4 (de) * 2014-03-17 2020-02-27 Satisloh Ag Vorrichtung zum Schleifen, Feinschleifen und/oder Polieren von Werkstücken in optischer Qualität, insbesondere von sphärischen Linsenflächen in der Feinoptik
KR20170016547A (ko) * 2015-08-03 2017-02-14 삼성전자주식회사 척 테이블 및 그를 포함하는 기판 제조 장치
US10040162B2 (en) * 2016-09-09 2018-08-07 Thielenhaus Technologies Gmbh Device for producing a curved surface
EP3418042A1 (fr) 2017-06-19 2018-12-26 Essilor International Élément optique et son procédé de production
CN108274341B (zh) * 2018-04-06 2019-11-29 温岭市奇锋工具有限公司 一种楔形镜成对加工的精磨抛光辅具
CN112720080B (zh) * 2020-12-22 2022-05-24 北京航天时代激光导航技术有限责任公司 一种面向三角激光陀螺的多贴片面专用加工方法
CN113560994A (zh) * 2021-09-28 2021-10-29 江苏嘉一北科光学科技有限公司 一种光学镜片加工用抛光连续化加工装置
CN114227447B (zh) * 2021-12-16 2023-03-28 浙江黄岩环日光学有限公司 一种制作非球面镜片模具的设备及其使用方法

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19750428B4 (de) * 1997-11-14 2007-06-21 Optotech Optikmaschinen Gmbh Verfahren und Vorrichtung zum Bearbeiten von Linsen
WO2003033205A1 (fr) * 2001-10-17 2003-04-24 Schneider Gmbh & Co. Kg Dispositif et procede pour l'usinage complet de lentilles optiquement actives sur les deux faces
EP2011603A1 (fr) * 2007-07-06 2009-01-07 Satisloh AG Machine destinée au traitement de pièces optiques, en particulier de verres solaires en plastique
WO2012088051A3 (fr) * 2010-12-23 2012-08-23 Exelis, Inc. Procédé et appareil pour polir et meuler une surface de rayon sur l'extrémité axiale d'un cylindre
US8672730B2 (en) 2010-12-23 2014-03-18 Exelis, Inc. Method and apparatus for polishing and grinding a radius surface on the axial end of a cylinder

Also Published As

Publication number Publication date
DE29723542U1 (de) 1998-11-19
US6383061B1 (en) 2002-05-07
CA2232258A1 (fr) 1998-09-26
US5951376A (en) 1999-09-14
DE59700201D1 (de) 1999-07-22
EP0868972B1 (fr) 1999-06-09

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